/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:20:35,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:20:35,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:20:35,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 22:20:35,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 22:20:35,911 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:20:35,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:20:35,912 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:20:35,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:20:35,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:20:35,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:20:35,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:20:35,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:20:35,913 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:20:35,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:20:35,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:20:35,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:20:35,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:20:35,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:20:35,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:20:35,914 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:20:35,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:20:35,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:20:35,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:20:35,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:20:35,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:20:35,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:20:35,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:20:35,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:20:35,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:20:35,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:20:35,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:20:35,915 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:20:35,915 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:20:35,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:20:35,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:20:36,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:20:36,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:20:36,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:20:36,100 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:20:36,102 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:20:36,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2022-01-09 22:20:36,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099c2f44d/32b674c141814f0299e5bf5e8ab87bac/FLAGf7a408553 [2022-01-09 22:20:36,551 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:20:36,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2022-01-09 22:20:36,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099c2f44d/32b674c141814f0299e5bf5e8ab87bac/FLAGf7a408553 [2022-01-09 22:20:36,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/099c2f44d/32b674c141814f0299e5bf5e8ab87bac [2022-01-09 22:20:36,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:20:36,575 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:20:36,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:20:36,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:20:36,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:20:36,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:20:36" (1/1) ... [2022-01-09 22:20:36,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49683c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:36, skipping insertion in model container [2022-01-09 22:20:36,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:20:36" (1/1) ... [2022-01-09 22:20:36,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:20:36,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:20:36,710 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-01-09 22:20:36,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:20:36,730 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:20:36,737 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-01-09 22:20:36,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:20:36,753 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:20:36,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:36 WrapperNode [2022-01-09 22:20:36,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:20:36,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:20:36,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:20:36,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:20:36,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:36" (1/1) ... [2022-01-09 22:20:36,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:36" (1/1) ... [2022-01-09 22:20:36,777 INFO L137 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 133 [2022-01-09 22:20:36,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:20:36,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:20:36,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:20:36,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:20:36,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:36" (1/1) ... [2022-01-09 22:20:36,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:36" (1/1) ... [2022-01-09 22:20:36,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:36" (1/1) ... [2022-01-09 22:20:36,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:36" (1/1) ... [2022-01-09 22:20:36,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:36" (1/1) ... [2022-01-09 22:20:36,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:36" (1/1) ... [2022-01-09 22:20:36,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:36" (1/1) ... [2022-01-09 22:20:36,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:20:36,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:20:36,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:20:36,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:20:36,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:36" (1/1) ... [2022-01-09 22:20:36,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:20:36,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:36,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-09 22:20:36,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-09 22:20:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:20:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:20:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 22:20:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 22:20:36,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:20:36,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:20:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 22:20:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 22:20:36,889 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:20:36,890 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:20:37,006 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:20:37,010 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:20:37,010 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-09 22:20:37,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:20:37 BoogieIcfgContainer [2022-01-09 22:20:37,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:20:37,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:20:37,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:20:37,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:20:37,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:20:36" (1/3) ... [2022-01-09 22:20:37,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1180a4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:20:37, skipping insertion in model container [2022-01-09 22:20:37,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:36" (2/3) ... [2022-01-09 22:20:37,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1180a4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:20:37, skipping insertion in model container [2022-01-09 22:20:37,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:20:37" (3/3) ... [2022-01-09 22:20:37,018 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-01-09 22:20:37,022 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:20:37,022 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:20:37,064 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:20:37,069 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-09 22:20:37,069 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:20:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:37,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-09 22:20:37,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:37,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:37,099 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:37,103 INFO L85 PathProgramCache]: Analyzing trace with hash 388073842, now seen corresponding path program 1 times [2022-01-09 22:20:37,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:37,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635928560] [2022-01-09 22:20:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:37,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:37,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:37,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635928560] [2022-01-09 22:20:37,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635928560] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:20:37,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:20:37,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 22:20:37,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053781393] [2022-01-09 22:20:37,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:20:37,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 22:20:37,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:37,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 22:20:37,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:20:37,325 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:37,341 INFO L93 Difference]: Finished difference Result 54 states and 82 transitions. [2022-01-09 22:20:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 22:20:37,343 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-09 22:20:37,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:37,348 INFO L225 Difference]: With dead ends: 54 [2022-01-09 22:20:37,349 INFO L226 Difference]: Without dead ends: 25 [2022-01-09 22:20:37,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:20:37,358 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:37,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:20:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-09 22:20:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-09 22:20:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-09 22:20:37,389 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2022-01-09 22:20:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:37,389 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-09 22:20:37,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-09 22:20:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-09 22:20:37,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:37,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:37,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:20:37,391 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:37,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:37,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2016618829, now seen corresponding path program 1 times [2022-01-09 22:20:37,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:37,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723354029] [2022-01-09 22:20:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:37,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:37,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:37,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723354029] [2022-01-09 22:20:37,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723354029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:20:37,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:20:37,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:20:37,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86091974] [2022-01-09 22:20:37,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:20:37,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 22:20:37,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:37,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 22:20:37,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:20:37,496 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:37,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:37,546 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-01-09 22:20:37,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 22:20:37,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-09 22:20:37,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:37,548 INFO L225 Difference]: With dead ends: 64 [2022-01-09 22:20:37,548 INFO L226 Difference]: Without dead ends: 43 [2022-01-09 22:20:37,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:20:37,551 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:37,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:20:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-09 22:20:37,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2022-01-09 22:20:37,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:37,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-01-09 22:20:37,555 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2022-01-09 22:20:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:37,555 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-01-09 22:20:37,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-01-09 22:20:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-09 22:20:37,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:37,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:37,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 22:20:37,556 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:37,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2094228111, now seen corresponding path program 1 times [2022-01-09 22:20:37,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:37,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169731796] [2022-01-09 22:20:37,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:37,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:37,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:37,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169731796] [2022-01-09 22:20:37,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169731796] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:37,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490109004] [2022-01-09 22:20:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:37,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:37,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:37,656 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:37,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 22:20:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:37,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-09 22:20:37,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 22:20:37,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:20:37,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490109004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:20:37,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 22:20:37,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-01-09 22:20:37,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283909446] [2022-01-09 22:20:37,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:20:37,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:20:37,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:37,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:20:37,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-09 22:20:37,859 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:37,903 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-01-09 22:20:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 22:20:37,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-09 22:20:37,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:37,904 INFO L225 Difference]: With dead ends: 52 [2022-01-09 22:20:37,904 INFO L226 Difference]: Without dead ends: 48 [2022-01-09 22:20:37,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-09 22:20:37,906 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:37,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 124 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:20:37,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-09 22:20:37,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-01-09 22:20:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2022-01-09 22:20:37,918 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2022-01-09 22:20:37,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:37,918 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2022-01-09 22:20:37,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:37,919 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2022-01-09 22:20:37,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-09 22:20:37,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:37,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:37,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:38,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:38,138 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:38,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:38,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2138024952, now seen corresponding path program 1 times [2022-01-09 22:20:38,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:38,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522328711] [2022-01-09 22:20:38,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:38,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 22:20:38,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:38,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522328711] [2022-01-09 22:20:38,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522328711] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:38,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015557929] [2022-01-09 22:20:38,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:38,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:38,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:38,206 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:38,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 22:20:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:38,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-09 22:20:38,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 22:20:38,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:20:38,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015557929] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:20:38,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 22:20:38,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-01-09 22:20:38,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218282900] [2022-01-09 22:20:38,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:20:38,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:20:38,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:38,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:20:38,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:20:38,294 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:38,320 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2022-01-09 22:20:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:20:38,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-09 22:20:38,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:38,321 INFO L225 Difference]: With dead ends: 97 [2022-01-09 22:20:38,321 INFO L226 Difference]: Without dead ends: 69 [2022-01-09 22:20:38,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:20:38,322 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:38,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 73 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:20:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-09 22:20:38,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2022-01-09 22:20:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:38,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-01-09 22:20:38,326 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 23 [2022-01-09 22:20:38,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:38,326 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-01-09 22:20:38,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-01-09 22:20:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-09 22:20:38,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:38,327 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:38,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-09 22:20:38,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-09 22:20:38,543 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:38,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1093571635, now seen corresponding path program 1 times [2022-01-09 22:20:38,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:38,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61601221] [2022-01-09 22:20:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:38,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:20:38,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:38,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61601221] [2022-01-09 22:20:38,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61601221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:38,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133852654] [2022-01-09 22:20:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:38,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:38,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:38,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:38,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 22:20:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:38,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-09 22:20:38,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:38,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-09 22:20:38,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-09 22:20:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 22:20:38,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 22:20:38,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133852654] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:38,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:20:38,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2022-01-09 22:20:38,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647120052] [2022-01-09 22:20:38,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:20:38,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-09 22:20:38,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-09 22:20:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-09 22:20:38,887 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:38,962 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2022-01-09 22:20:38,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-09 22:20:38,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-09 22:20:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:38,965 INFO L225 Difference]: With dead ends: 61 [2022-01-09 22:20:38,965 INFO L226 Difference]: Without dead ends: 40 [2022-01-09 22:20:38,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-01-09 22:20:38,966 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:38,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 108 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:20:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-09 22:20:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-09 22:20:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-01-09 22:20:38,974 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2022-01-09 22:20:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:38,974 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-01-09 22:20:38,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-01-09 22:20:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-09 22:20:38,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:38,976 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:38,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-09 22:20:39,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:39,192 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:39,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:39,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1875229501, now seen corresponding path program 1 times [2022-01-09 22:20:39,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:39,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393839037] [2022-01-09 22:20:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:39,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:20:39,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:39,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393839037] [2022-01-09 22:20:39,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393839037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:39,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36812022] [2022-01-09 22:20:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:39,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:39,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:39,251 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:39,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 22:20:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:39,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-09 22:20:39,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:39,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-09 22:20:39,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-09 22:20:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 22:20:39,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:20:39,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36812022] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:39,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:20:39,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2022-01-09 22:20:39,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835623814] [2022-01-09 22:20:39,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:20:39,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-09 22:20:39,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:39,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-09 22:20:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-09 22:20:39,501 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:39,571 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2022-01-09 22:20:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-09 22:20:39,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-09 22:20:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:39,572 INFO L225 Difference]: With dead ends: 66 [2022-01-09 22:20:39,572 INFO L226 Difference]: Without dead ends: 62 [2022-01-09 22:20:39,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-01-09 22:20:39,573 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:39,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 65 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:20:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-09 22:20:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2022-01-09 22:20:39,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-01-09 22:20:39,585 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 25 [2022-01-09 22:20:39,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:39,585 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-01-09 22:20:39,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:39,585 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-01-09 22:20:39,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-09 22:20:39,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:39,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:39,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:39,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:39,800 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:39,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1536847246, now seen corresponding path program 1 times [2022-01-09 22:20:39,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:39,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658944770] [2022-01-09 22:20:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:39,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-09 22:20:39,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:39,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658944770] [2022-01-09 22:20:39,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658944770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:39,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539703733] [2022-01-09 22:20:39,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:39,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:39,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:39,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:39,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 22:20:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:39,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-09 22:20:39,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-09 22:20:39,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:20:39,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539703733] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:39,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:39,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 8 [2022-01-09 22:20:39,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236734300] [2022-01-09 22:20:39,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:39,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 22:20:39,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 22:20:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-09 22:20:39,970 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:40,119 INFO L93 Difference]: Finished difference Result 220 states and 289 transitions. [2022-01-09 22:20:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-09 22:20:40,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-09 22:20:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:40,120 INFO L225 Difference]: With dead ends: 220 [2022-01-09 22:20:40,120 INFO L226 Difference]: Without dead ends: 183 [2022-01-09 22:20:40,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-01-09 22:20:40,121 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 228 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:40,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 169 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:20:40,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-09 22:20:40,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 48. [2022-01-09 22:20:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:40,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-01-09 22:20:40,126 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 26 [2022-01-09 22:20:40,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:40,126 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-01-09 22:20:40,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-01-09 22:20:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-09 22:20:40,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:40,127 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:40,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:40,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:40,344 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:40,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1845688875, now seen corresponding path program 2 times [2022-01-09 22:20:40,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:40,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563786526] [2022-01-09 22:20:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:40,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-09 22:20:40,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:40,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563786526] [2022-01-09 22:20:40,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563786526] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:40,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127030216] [2022-01-09 22:20:40,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:20:40,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:40,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:40,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:40,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 22:20:40,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:20:40,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:20:40,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-09 22:20:40,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:40,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-09 22:20:40,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-09 22:20:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 22:20:40,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-09 22:20:40,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127030216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:40,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:40,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 9] total 21 [2022-01-09 22:20:40,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776460527] [2022-01-09 22:20:40,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:40,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-09 22:20:40,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:40,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-09 22:20:40,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-09 22:20:40,736 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:41,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:41,018 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2022-01-09 22:20:41,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-09 22:20:41,018 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-09 22:20:41,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:41,020 INFO L225 Difference]: With dead ends: 236 [2022-01-09 22:20:41,020 INFO L226 Difference]: Without dead ends: 195 [2022-01-09 22:20:41,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2022-01-09 22:20:41,021 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 378 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:41,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 442 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 22:20:41,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-09 22:20:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 73. [2022-01-09 22:20:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 72 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2022-01-09 22:20:41,028 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 30 [2022-01-09 22:20:41,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:41,029 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2022-01-09 22:20:41,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:41,029 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2022-01-09 22:20:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-09 22:20:41,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:41,029 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:41,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:41,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:41,243 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:41,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:41,244 INFO L85 PathProgramCache]: Analyzing trace with hash -926448804, now seen corresponding path program 1 times [2022-01-09 22:20:41,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:41,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952181942] [2022-01-09 22:20:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:41,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 22:20:41,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:41,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952181942] [2022-01-09 22:20:41,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952181942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:41,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970286404] [2022-01-09 22:20:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:41,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:41,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:41,298 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:41,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 22:20:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:41,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 22:20:41,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-09 22:20:41,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:20:41,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970286404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:20:41,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 22:20:41,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-01-09 22:20:41,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315753730] [2022-01-09 22:20:41,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:20:41,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 22:20:41,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:41,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 22:20:41,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-09 22:20:41,392 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:41,408 INFO L93 Difference]: Finished difference Result 139 states and 188 transitions. [2022-01-09 22:20:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 22:20:41,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-09 22:20:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:41,409 INFO L225 Difference]: With dead ends: 139 [2022-01-09 22:20:41,409 INFO L226 Difference]: Without dead ends: 95 [2022-01-09 22:20:41,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-09 22:20:41,412 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:41,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:20:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-09 22:20:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2022-01-09 22:20:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 79 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2022-01-09 22:20:41,422 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 33 [2022-01-09 22:20:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:41,422 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2022-01-09 22:20:41,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2022-01-09 22:20:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-09 22:20:41,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:41,423 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:41,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:41,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:41,635 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:41,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:41,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1076823445, now seen corresponding path program 1 times [2022-01-09 22:20:41,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:41,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683381282] [2022-01-09 22:20:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:41,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-09 22:20:41,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:41,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683381282] [2022-01-09 22:20:41,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683381282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:41,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471462611] [2022-01-09 22:20:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:41,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:41,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:41,680 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:41,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 22:20:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:41,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-09 22:20:41,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 22:20:41,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-09 22:20:41,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471462611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:41,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:41,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2022-01-09 22:20:41,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461392894] [2022-01-09 22:20:41,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:41,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-09 22:20:41,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:41,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-09 22:20:41,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-09 22:20:41,915 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:42,503 INFO L93 Difference]: Finished difference Result 527 states and 676 transitions. [2022-01-09 22:20:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-09 22:20:42,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-09 22:20:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:42,505 INFO L225 Difference]: With dead ends: 527 [2022-01-09 22:20:42,505 INFO L226 Difference]: Without dead ends: 448 [2022-01-09 22:20:42,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2022-01-09 22:20:42,508 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 658 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:42,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 790 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-09 22:20:42,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-09 22:20:42,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 111. [2022-01-09 22:20:42,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.290909090909091) internal successors, (142), 110 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 142 transitions. [2022-01-09 22:20:42,531 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 142 transitions. Word has length 36 [2022-01-09 22:20:42,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:42,531 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 142 transitions. [2022-01-09 22:20:42,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 142 transitions. [2022-01-09 22:20:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-09 22:20:42,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:42,536 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:42,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:42,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-09 22:20:42,752 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1408390255, now seen corresponding path program 1 times [2022-01-09 22:20:42,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:42,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188733101] [2022-01-09 22:20:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:42,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-09 22:20:42,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:42,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188733101] [2022-01-09 22:20:42,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188733101] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:42,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200274499] [2022-01-09 22:20:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:42,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:42,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:42,802 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:42,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 22:20:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:42,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-09 22:20:42,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:43,098 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 22:20:43,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-01-09 22:20:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-09 22:20:43,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:43,232 INFO L353 Elim1Store]: treesize reduction 27, result has 68.2 percent of original size [2022-01-09 22:20:43,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 65 [2022-01-09 22:20:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-09 22:20:43,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200274499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:43,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:43,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 21 [2022-01-09 22:20:43,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301358671] [2022-01-09 22:20:43,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:43,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-09 22:20:43,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:43,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-09 22:20:43,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-09 22:20:43,334 INFO L87 Difference]: Start difference. First operand 111 states and 142 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:43,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:43,926 INFO L93 Difference]: Finished difference Result 669 states and 886 transitions. [2022-01-09 22:20:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-09 22:20:43,928 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-01-09 22:20:43,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:43,930 INFO L225 Difference]: With dead ends: 669 [2022-01-09 22:20:43,930 INFO L226 Difference]: Without dead ends: 569 [2022-01-09 22:20:43,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-01-09 22:20:43,931 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 489 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:43,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 915 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 22:20:43,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-09 22:20:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 159. [2022-01-09 22:20:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.2848101265822784) internal successors, (203), 158 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 203 transitions. [2022-01-09 22:20:43,949 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 203 transitions. Word has length 38 [2022-01-09 22:20:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:43,949 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 203 transitions. [2022-01-09 22:20:43,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 203 transitions. [2022-01-09 22:20:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-09 22:20:43,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:43,950 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:43,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:44,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:44,152 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:44,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1678328275, now seen corresponding path program 1 times [2022-01-09 22:20:44,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:44,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063025775] [2022-01-09 22:20:44,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:44,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-09 22:20:44,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:44,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063025775] [2022-01-09 22:20:44,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063025775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:44,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737221275] [2022-01-09 22:20:44,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:44,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:44,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:44,192 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:44,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 22:20:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:44,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-09 22:20:44,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:44,441 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-09 22:20:44,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-01-09 22:20:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-09 22:20:44,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:44,568 INFO L353 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-01-09 22:20:44,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-01-09 22:20:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-09 22:20:44,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737221275] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:44,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:44,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 9] total 18 [2022-01-09 22:20:44,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577226085] [2022-01-09 22:20:44,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:44,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-09 22:20:44,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:44,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-09 22:20:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-01-09 22:20:44,650 INFO L87 Difference]: Start difference. First operand 159 states and 203 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:44,909 INFO L93 Difference]: Finished difference Result 458 states and 623 transitions. [2022-01-09 22:20:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-09 22:20:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-09 22:20:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:44,910 INFO L225 Difference]: With dead ends: 458 [2022-01-09 22:20:44,911 INFO L226 Difference]: Without dead ends: 356 [2022-01-09 22:20:44,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-01-09 22:20:44,911 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 217 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:44,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 210 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:20:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-09 22:20:44,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 213. [2022-01-09 22:20:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.2547169811320755) internal successors, (266), 212 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 266 transitions. [2022-01-09 22:20:44,933 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 266 transitions. Word has length 40 [2022-01-09 22:20:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:44,933 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 266 transitions. [2022-01-09 22:20:44,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 266 transitions. [2022-01-09 22:20:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-09 22:20:44,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:44,934 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:44,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:45,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-09 22:20:45,147 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1208431142, now seen corresponding path program 2 times [2022-01-09 22:20:45,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:45,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950575449] [2022-01-09 22:20:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:45,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-09 22:20:45,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:45,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950575449] [2022-01-09 22:20:45,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950575449] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:45,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116274313] [2022-01-09 22:20:45,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:20:45,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:45,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:45,303 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:45,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-09 22:20:45,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:20:45,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:20:45,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-09 22:20:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-09 22:20:45,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-09 22:20:45,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116274313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:45,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:45,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 20 [2022-01-09 22:20:45,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780247269] [2022-01-09 22:20:45,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:45,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-09 22:20:45,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:45,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-09 22:20:45,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-09 22:20:45,683 INFO L87 Difference]: Start difference. First operand 213 states and 266 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:46,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:46,475 INFO L93 Difference]: Finished difference Result 690 states and 882 transitions. [2022-01-09 22:20:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-09 22:20:46,475 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-01-09 22:20:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:46,477 INFO L225 Difference]: With dead ends: 690 [2022-01-09 22:20:46,477 INFO L226 Difference]: Without dead ends: 684 [2022-01-09 22:20:46,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2022-01-09 22:20:46,478 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 515 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:46,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1150 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 22:20:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-01-09 22:20:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 279. [2022-01-09 22:20:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.2589928057553956) internal successors, (350), 278 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 350 transitions. [2022-01-09 22:20:46,513 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 350 transitions. Word has length 46 [2022-01-09 22:20:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:46,513 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 350 transitions. [2022-01-09 22:20:46,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 350 transitions. [2022-01-09 22:20:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-09 22:20:46,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:46,514 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:46,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:46,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-09 22:20:46,727 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash -528372772, now seen corresponding path program 1 times [2022-01-09 22:20:46,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:46,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61216797] [2022-01-09 22:20:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:46,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 22:20:47,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:47,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61216797] [2022-01-09 22:20:47,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61216797] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:47,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913352258] [2022-01-09 22:20:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:47,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:47,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:47,014 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:47,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-09 22:20:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-09 22:20:47,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:47,483 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 22:20:47,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2022-01-09 22:20:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-09 22:20:47,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:47,786 INFO L353 Elim1Store]: treesize reduction 72, result has 55.8 percent of original size [2022-01-09 22:20:47,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 102 [2022-01-09 22:20:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-09 22:20:47,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913352258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:47,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:47,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 13] total 31 [2022-01-09 22:20:47,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617207587] [2022-01-09 22:20:47,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:47,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-09 22:20:47,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:47,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-09 22:20:47,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-01-09 22:20:47,972 INFO L87 Difference]: Start difference. First operand 279 states and 350 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:49,816 INFO L93 Difference]: Finished difference Result 709 states and 917 transitions. [2022-01-09 22:20:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-09 22:20:49,817 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-01-09 22:20:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:49,818 INFO L225 Difference]: With dead ends: 709 [2022-01-09 22:20:49,819 INFO L226 Difference]: Without dead ends: 562 [2022-01-09 22:20:49,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=746, Invalid=3676, Unknown=0, NotChecked=0, Total=4422 [2022-01-09 22:20:49,820 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 254 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:49,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 365 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 22:20:49,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-09 22:20:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 411. [2022-01-09 22:20:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.2634146341463415) internal successors, (518), 410 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 518 transitions. [2022-01-09 22:20:49,869 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 518 transitions. Word has length 46 [2022-01-09 22:20:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:49,870 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 518 transitions. [2022-01-09 22:20:49,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 518 transitions. [2022-01-09 22:20:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-09 22:20:49,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:49,871 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:49,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:50,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-09 22:20:50,086 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:50,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:50,087 INFO L85 PathProgramCache]: Analyzing trace with hash -785729316, now seen corresponding path program 1 times [2022-01-09 22:20:50,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:50,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884451798] [2022-01-09 22:20:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:50,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-09 22:20:50,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:50,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884451798] [2022-01-09 22:20:50,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884451798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:50,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032433469] [2022-01-09 22:20:50,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:50,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:50,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:50,343 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:50,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-09 22:20:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:50,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-09 22:20:50,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:50,801 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 22:20:50,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-01-09 22:20:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-09 22:20:50,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:51,072 INFO L353 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-01-09 22:20:51,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-01-09 22:20:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-09 22:20:51,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032433469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:51,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:51,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 13] total 30 [2022-01-09 22:20:51,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921090994] [2022-01-09 22:20:51,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:51,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-09 22:20:51,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-09 22:20:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-01-09 22:20:51,250 INFO L87 Difference]: Start difference. First operand 411 states and 518 transitions. Second operand has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:53,382 INFO L93 Difference]: Finished difference Result 803 states and 1034 transitions. [2022-01-09 22:20:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-09 22:20:53,382 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-01-09 22:20:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:53,385 INFO L225 Difference]: With dead ends: 803 [2022-01-09 22:20:53,385 INFO L226 Difference]: Without dead ends: 675 [2022-01-09 22:20:53,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1294, Invalid=5186, Unknown=0, NotChecked=0, Total=6480 [2022-01-09 22:20:53,387 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 387 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:53,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 405 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 22:20:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-01-09 22:20:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 449. [2022-01-09 22:20:53,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.2366071428571428) internal successors, (554), 448 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 554 transitions. [2022-01-09 22:20:53,480 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 554 transitions. Word has length 46 [2022-01-09 22:20:53,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:53,480 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 554 transitions. [2022-01-09 22:20:53,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 554 transitions. [2022-01-09 22:20:53,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-09 22:20:53,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:53,481 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:53,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:53,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-09 22:20:53,684 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:53,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:53,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1118186595, now seen corresponding path program 1 times [2022-01-09 22:20:53,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:53,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001762308] [2022-01-09 22:20:53,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:53,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-09 22:20:53,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:53,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001762308] [2022-01-09 22:20:53,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001762308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:53,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932426596] [2022-01-09 22:20:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:53,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:53,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:53,736 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:53,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-09 22:20:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:53,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-09 22:20:53,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-09 22:20:53,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-09 22:20:53,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932426596] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:53,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:53,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 8] total 14 [2022-01-09 22:20:53,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504672055] [2022-01-09 22:20:53,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:53,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 22:20:53,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:53,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 22:20:53,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-09 22:20:53,971 INFO L87 Difference]: Start difference. First operand 449 states and 554 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:54,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:54,208 INFO L93 Difference]: Finished difference Result 858 states and 1060 transitions. [2022-01-09 22:20:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 22:20:54,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-09 22:20:54,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:54,210 INFO L225 Difference]: With dead ends: 858 [2022-01-09 22:20:54,210 INFO L226 Difference]: Without dead ends: 455 [2022-01-09 22:20:54,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-09 22:20:54,211 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 152 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:54,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 187 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:20:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-01-09 22:20:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 308. [2022-01-09 22:20:54,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.1661237785016287) internal successors, (358), 307 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 358 transitions. [2022-01-09 22:20:54,279 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 358 transitions. Word has length 49 [2022-01-09 22:20:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:54,279 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 358 transitions. [2022-01-09 22:20:54,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 358 transitions. [2022-01-09 22:20:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-09 22:20:54,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:54,280 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:54,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:54,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:54,487 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:54,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:54,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1957503021, now seen corresponding path program 1 times [2022-01-09 22:20:54,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:54,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557334693] [2022-01-09 22:20:54,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:54,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-01-09 22:20:54,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:54,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557334693] [2022-01-09 22:20:54,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557334693] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:54,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890608851] [2022-01-09 22:20:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:54,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:54,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:54,556 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:54,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-09 22:20:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:54,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-09 22:20:54,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-09 22:20:54,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-09 22:20:54,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890608851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:54,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:54,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 18 [2022-01-09 22:20:54,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364248222] [2022-01-09 22:20:54,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:54,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-09 22:20:54,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:54,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-09 22:20:54,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-09 22:20:54,826 INFO L87 Difference]: Start difference. First operand 308 states and 358 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:57,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:57,737 INFO L93 Difference]: Finished difference Result 2116 states and 2453 transitions. [2022-01-09 22:20:57,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-09 22:20:57,738 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-09 22:20:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:57,742 INFO L225 Difference]: With dead ends: 2116 [2022-01-09 22:20:57,743 INFO L226 Difference]: Without dead ends: 2052 [2022-01-09 22:20:57,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6679 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2147, Invalid=14883, Unknown=0, NotChecked=0, Total=17030 [2022-01-09 22:20:57,746 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 1569 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1569 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:57,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1569 Valid, 406 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-09 22:20:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2022-01-09 22:20:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 338. [2022-01-09 22:20:57,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.1691394658753709) internal successors, (394), 337 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 394 transitions. [2022-01-09 22:20:57,809 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 394 transitions. Word has length 49 [2022-01-09 22:20:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:57,810 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 394 transitions. [2022-01-09 22:20:57,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:57,810 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 394 transitions. [2022-01-09 22:20:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-09 22:20:57,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:57,810 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:57,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:58,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-09 22:20:58,023 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:58,024 INFO L85 PathProgramCache]: Analyzing trace with hash -723438098, now seen corresponding path program 2 times [2022-01-09 22:20:58,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:58,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936639941] [2022-01-09 22:20:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:58,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-09 22:20:58,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:58,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936639941] [2022-01-09 22:20:58,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936639941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:58,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360398447] [2022-01-09 22:20:58,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:20:58,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:58,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:58,306 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:20:58,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-09 22:20:58,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:20:58,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:20:58,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-09 22:20:58,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:58,926 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 22:20:58,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 17 [2022-01-09 22:20:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-09 22:20:58,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:59,411 INFO L353 Elim1Store]: treesize reduction 81, result has 42.6 percent of original size [2022-01-09 22:20:59,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 75 [2022-01-09 22:20:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-09 22:20:59,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360398447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:59,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:59,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 15] total 40 [2022-01-09 22:20:59,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145713425] [2022-01-09 22:20:59,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:59,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-09 22:20:59,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-09 22:20:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2022-01-09 22:20:59,459 INFO L87 Difference]: Start difference. First operand 338 states and 394 transitions. Second operand has 40 states, 40 states have (on average 2.75) internal successors, (110), 40 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:21:00,292 INFO L93 Difference]: Finished difference Result 452 states and 516 transitions. [2022-01-09 22:21:00,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-09 22:21:00,293 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.75) internal successors, (110), 40 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-01-09 22:21:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:21:00,294 INFO L225 Difference]: With dead ends: 452 [2022-01-09 22:21:00,294 INFO L226 Difference]: Without dead ends: 369 [2022-01-09 22:21:00,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=514, Invalid=2456, Unknown=0, NotChecked=0, Total=2970 [2022-01-09 22:21:00,295 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 301 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 22:21:00,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 492 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 542 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2022-01-09 22:21:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-09 22:21:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 316. [2022-01-09 22:21:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.1714285714285715) internal successors, (369), 315 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 369 transitions. [2022-01-09 22:21:00,348 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 369 transitions. Word has length 56 [2022-01-09 22:21:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:21:00,348 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 369 transitions. [2022-01-09 22:21:00,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.75) internal successors, (110), 40 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:00,348 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 369 transitions. [2022-01-09 22:21:00,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-09 22:21:00,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:21:00,349 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:21:00,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-09 22:21:00,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-09 22:21:00,555 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:21:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:21:00,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1709422695, now seen corresponding path program 2 times [2022-01-09 22:21:00,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:21:00,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946439385] [2022-01-09 22:21:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:21:00,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:21:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:21:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-01-09 22:21:00,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:21:00,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946439385] [2022-01-09 22:21:00,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946439385] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:21:00,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727926875] [2022-01-09 22:21:00,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:21:00,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:00,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:21:00,654 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:21:00,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-09 22:21:00,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:21:00,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:21:00,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-09 22:21:00,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:21:01,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-09 22:21:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-09 22:21:01,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:21:01,182 INFO L353 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-01-09 22:21:01,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-01-09 22:21:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-09 22:21:01,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727926875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:21:01,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:21:01,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 11] total 30 [2022-01-09 22:21:01,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985347438] [2022-01-09 22:21:01,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:21:01,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-09 22:21:01,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:21:01,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-09 22:21:01,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-01-09 22:21:01,246 INFO L87 Difference]: Start difference. First operand 316 states and 369 transitions. Second operand has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:21:03,027 INFO L93 Difference]: Finished difference Result 3040 states and 3560 transitions. [2022-01-09 22:21:03,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-09 22:21:03,027 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-01-09 22:21:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:21:03,033 INFO L225 Difference]: With dead ends: 3040 [2022-01-09 22:21:03,033 INFO L226 Difference]: Without dead ends: 2940 [2022-01-09 22:21:03,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=387, Invalid=3035, Unknown=0, NotChecked=0, Total=3422 [2022-01-09 22:21:03,035 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 1000 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 2702 SdHoareTripleChecker+Invalid, 2230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-09 22:21:03,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 2702 Invalid, 2230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-09 22:21:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2022-01-09 22:21:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 610. [2022-01-09 22:21:03,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 1.1658456486042692) internal successors, (710), 609 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:03,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 710 transitions. [2022-01-09 22:21:03,181 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 710 transitions. Word has length 57 [2022-01-09 22:21:03,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:21:03,181 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 710 transitions. [2022-01-09 22:21:03,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 710 transitions. [2022-01-09 22:21:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-09 22:21:03,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:21:03,182 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:21:03,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-09 22:21:03,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:03,385 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:21:03,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:21:03,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1786130607, now seen corresponding path program 3 times [2022-01-09 22:21:03,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:21:03,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152474701] [2022-01-09 22:21:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:21:03,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:21:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:21:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-09 22:21:04,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:21:04,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152474701] [2022-01-09 22:21:04,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152474701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:21:04,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684756959] [2022-01-09 22:21:04,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:21:04,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:04,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:21:04,052 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:21:04,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-09 22:21:04,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-09 22:21:04,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:21:04,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-09 22:21:04,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:21:04,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 22:21:04,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 22:21:04,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 22:21:04,816 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-01-09 22:21:04,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 16 [2022-01-09 22:21:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-09 22:21:04,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:21:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-09 22:21:05,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684756959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:21:05,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:21:05,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 14] total 37 [2022-01-09 22:21:05,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137321283] [2022-01-09 22:21:05,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:21:05,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-09 22:21:05,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:21:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-09 22:21:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-01-09 22:21:05,197 INFO L87 Difference]: Start difference. First operand 610 states and 710 transitions. Second operand has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:21:07,229 INFO L93 Difference]: Finished difference Result 1696 states and 1957 transitions. [2022-01-09 22:21:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-09 22:21:07,229 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-09 22:21:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:21:07,232 INFO L225 Difference]: With dead ends: 1696 [2022-01-09 22:21:07,232 INFO L226 Difference]: Without dead ends: 1494 [2022-01-09 22:21:07,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 117 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=875, Invalid=4527, Unknown=0, NotChecked=0, Total=5402 [2022-01-09 22:21:07,234 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 575 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 22:21:07,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 785 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1080 Invalid, 0 Unknown, 225 Unchecked, 0.6s Time] [2022-01-09 22:21:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-01-09 22:21:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 934. [2022-01-09 22:21:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.1639871382636655) internal successors, (1086), 933 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1086 transitions. [2022-01-09 22:21:07,437 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1086 transitions. Word has length 67 [2022-01-09 22:21:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:21:07,437 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1086 transitions. [2022-01-09 22:21:07,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1086 transitions. [2022-01-09 22:21:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-09 22:21:07,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:21:07,438 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:21:07,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-09 22:21:07,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:07,655 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:21:07,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:21:07,656 INFO L85 PathProgramCache]: Analyzing trace with hash -436746483, now seen corresponding path program 4 times [2022-01-09 22:21:07,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:21:07,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365998521] [2022-01-09 22:21:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:21:07,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:21:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:21:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-09 22:21:08,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:21:08,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365998521] [2022-01-09 22:21:08,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365998521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:21:08,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356609916] [2022-01-09 22:21:08,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 22:21:08,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:08,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:21:08,301 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:21:08,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-09 22:21:08,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 22:21:08,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:21:08,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-09 22:21:08,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:21:08,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 22:21:08,921 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-01-09 22:21:08,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-01-09 22:21:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 59 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-09 22:21:08,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:21:09,127 INFO L353 Elim1Store]: treesize reduction 35, result has 63.9 percent of original size [2022-01-09 22:21:09,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 69 [2022-01-09 22:21:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 22:21:09,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356609916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:21:09,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:21:09,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 13] total 38 [2022-01-09 22:21:09,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012473840] [2022-01-09 22:21:09,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:21:09,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-09 22:21:09,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:21:09,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-09 22:21:09,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-01-09 22:21:09,300 INFO L87 Difference]: Start difference. First operand 934 states and 1086 transitions. Second operand has 38 states, 38 states have (on average 3.4473684210526314) internal successors, (131), 38 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:21:11,756 INFO L93 Difference]: Finished difference Result 2040 states and 2342 transitions. [2022-01-09 22:21:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-09 22:21:11,756 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.4473684210526314) internal successors, (131), 38 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-09 22:21:11,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:21:11,760 INFO L225 Difference]: With dead ends: 2040 [2022-01-09 22:21:11,760 INFO L226 Difference]: Without dead ends: 1746 [2022-01-09 22:21:11,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=897, Invalid=5265, Unknown=0, NotChecked=0, Total=6162 [2022-01-09 22:21:11,762 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 393 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 22:21:11,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 761 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 22:21:11,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-01-09 22:21:12,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1219. [2022-01-09 22:21:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 1.1625615763546797) internal successors, (1416), 1218 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:12,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1416 transitions. [2022-01-09 22:21:12,027 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1416 transitions. Word has length 67 [2022-01-09 22:21:12,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:21:12,028 INFO L470 AbstractCegarLoop]: Abstraction has 1219 states and 1416 transitions. [2022-01-09 22:21:12,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.4473684210526314) internal successors, (131), 38 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:12,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1416 transitions. [2022-01-09 22:21:12,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-09 22:21:12,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:21:12,029 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:21:12,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-09 22:21:12,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:12,243 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:21:12,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:21:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash 6687953, now seen corresponding path program 5 times [2022-01-09 22:21:12,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:21:12,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507968890] [2022-01-09 22:21:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:21:12,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:21:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:21:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-09 22:21:12,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:21:12,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507968890] [2022-01-09 22:21:12,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507968890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:21:12,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056325754] [2022-01-09 22:21:12,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 22:21:12,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:12,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:21:12,806 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:21:12,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-09 22:21:13,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-09 22:21:13,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:21:13,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-09 22:21:13,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:21:13,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 22:21:13,530 INFO L353 Elim1Store]: treesize reduction 17, result has 75.4 percent of original size [2022-01-09 22:21:13,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 65 [2022-01-09 22:21:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-09 22:21:13,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:21:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 29 proven. 29 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-09 22:21:15,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056325754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:21:15,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:21:15,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 47 [2022-01-09 22:21:15,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584111187] [2022-01-09 22:21:15,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:21:15,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-09 22:21:15,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:21:15,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-09 22:21:15,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1814, Unknown=0, NotChecked=0, Total=2162 [2022-01-09 22:21:15,271 INFO L87 Difference]: Start difference. First operand 1219 states and 1416 transitions. Second operand has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 47 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:21:18,600 INFO L93 Difference]: Finished difference Result 2016 states and 2278 transitions. [2022-01-09 22:21:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-09 22:21:18,600 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 47 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-09 22:21:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:21:18,604 INFO L225 Difference]: With dead ends: 2016 [2022-01-09 22:21:18,604 INFO L226 Difference]: Without dead ends: 1829 [2022-01-09 22:21:18,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 138 SyntacticMatches, 18 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4919 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1651, Invalid=10559, Unknown=0, NotChecked=0, Total=12210 [2022-01-09 22:21:18,606 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 467 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 694 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 22:21:18,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 605 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 880 Invalid, 0 Unknown, 694 Unchecked, 0.5s Time] [2022-01-09 22:21:18,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2022-01-09 22:21:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1327. [2022-01-09 22:21:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 1.145550527903469) internal successors, (1519), 1326 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1519 transitions. [2022-01-09 22:21:18,923 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1519 transitions. Word has length 67 [2022-01-09 22:21:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:21:18,923 INFO L470 AbstractCegarLoop]: Abstraction has 1327 states and 1519 transitions. [2022-01-09 22:21:18,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 47 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1519 transitions. [2022-01-09 22:21:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-09 22:21:18,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:21:18,925 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:21:18,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-09 22:21:19,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-09 22:21:19,145 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:21:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:21:19,145 INFO L85 PathProgramCache]: Analyzing trace with hash -415204979, now seen corresponding path program 6 times [2022-01-09 22:21:19,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:21:19,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071281755] [2022-01-09 22:21:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:21:19,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:21:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:21:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-09 22:21:19,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:21:19,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071281755] [2022-01-09 22:21:19,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071281755] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:21:19,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247713312] [2022-01-09 22:21:19,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 22:21:19,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:19,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:21:19,806 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:21:19,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-09 22:21:19,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-09 22:21:19,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:21:19,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-09 22:21:19,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:21:20,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 22:21:20,459 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-01-09 22:21:20,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 18 [2022-01-09 22:21:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 22:21:20,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:21:23,251 INFO L353 Elim1Store]: treesize reduction 27, result has 73.8 percent of original size [2022-01-09 22:21:23,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 83 [2022-01-09 22:21:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 22:21:23,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247713312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:21:23,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:21:23,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 38 [2022-01-09 22:21:23,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448116428] [2022-01-09 22:21:23,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:21:23,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-09 22:21:23,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:21:23,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-09 22:21:23,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1197, Unknown=5, NotChecked=0, Total=1406 [2022-01-09 22:21:23,403 INFO L87 Difference]: Start difference. First operand 1327 states and 1519 transitions. Second operand has 38 states, 38 states have (on average 3.3157894736842106) internal successors, (126), 38 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:25,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:21:25,221 INFO L93 Difference]: Finished difference Result 2052 states and 2334 transitions. [2022-01-09 22:21:25,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-09 22:21:25,222 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3157894736842106) internal successors, (126), 38 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-09 22:21:25,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:21:25,226 INFO L225 Difference]: With dead ends: 2052 [2022-01-09 22:21:25,226 INFO L226 Difference]: Without dead ends: 1688 [2022-01-09 22:21:25,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 122 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=662, Invalid=3493, Unknown=5, NotChecked=0, Total=4160 [2022-01-09 22:21:25,227 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 397 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 22:21:25,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 629 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 901 Invalid, 0 Unknown, 204 Unchecked, 0.5s Time] [2022-01-09 22:21:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2022-01-09 22:21:25,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1239. [2022-01-09 22:21:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 1.1365105008077545) internal successors, (1407), 1238 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1407 transitions. [2022-01-09 22:21:25,536 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1407 transitions. Word has length 67 [2022-01-09 22:21:25,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:21:25,536 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 1407 transitions. [2022-01-09 22:21:25,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3157894736842106) internal successors, (126), 38 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1407 transitions. [2022-01-09 22:21:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-09 22:21:25,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:21:25,538 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:21:25,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-09 22:21:25,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-09 22:21:25,750 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:21:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:21:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash -611339524, now seen corresponding path program 3 times [2022-01-09 22:21:25,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:21:25,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050331889] [2022-01-09 22:21:25,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:21:25,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:21:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:21:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-01-09 22:21:25,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:21:25,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050331889] [2022-01-09 22:21:25,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050331889] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:21:25,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107969766] [2022-01-09 22:21:25,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:21:25,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:25,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:21:25,861 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:21:25,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-09 22:21:25,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 22:21:25,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:21:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-09 22:21:25,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:21:26,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 22:21:26,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-09 22:21:26,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-01-09 22:21:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-09 22:21:26,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:21:26,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107969766] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:21:26,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 22:21:26,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2022-01-09 22:21:26,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850930605] [2022-01-09 22:21:26,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:21:26,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 22:21:26,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:21:26,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 22:21:26,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-09 22:21:26,173 INFO L87 Difference]: Start difference. First operand 1239 states and 1407 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:21:26,527 INFO L93 Difference]: Finished difference Result 1284 states and 1458 transitions. [2022-01-09 22:21:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 22:21:26,527 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-09 22:21:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:21:26,530 INFO L225 Difference]: With dead ends: 1284 [2022-01-09 22:21:26,531 INFO L226 Difference]: Without dead ends: 1218 [2022-01-09 22:21:26,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-01-09 22:21:26,531 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:21:26,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 95 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-01-09 22:21:26,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2022-01-09 22:21:26,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1218. [2022-01-09 22:21:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 1.134757600657354) internal successors, (1381), 1217 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1381 transitions. [2022-01-09 22:21:26,829 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1381 transitions. Word has length 69 [2022-01-09 22:21:26,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:21:26,829 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 1381 transitions. [2022-01-09 22:21:26,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1381 transitions. [2022-01-09 22:21:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-09 22:21:26,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:21:26,831 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:21:26,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-09 22:21:27,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:27,049 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:21:27,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:21:27,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1765343351, now seen corresponding path program 7 times [2022-01-09 22:21:27,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:21:27,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644223595] [2022-01-09 22:21:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:21:27,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:21:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:21:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 36 proven. 30 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-09 22:21:27,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:21:27,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644223595] [2022-01-09 22:21:27,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644223595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:21:27,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265317150] [2022-01-09 22:21:27,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 22:21:27,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:27,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:21:27,164 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:21:27,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-09 22:21:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:21:27,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-09 22:21:27,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:21:28,126 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 22:21:28,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-01-09 22:21:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-09 22:21:28,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:21:28,728 INFO L353 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-01-09 22:21:28,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 37 [2022-01-09 22:21:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-01-09 22:21:28,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265317150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:21:28,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:21:28,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 21, 18] total 43 [2022-01-09 22:21:28,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828053914] [2022-01-09 22:21:28,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:21:28,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-09 22:21:28,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:21:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-09 22:21:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2022-01-09 22:21:28,772 INFO L87 Difference]: Start difference. First operand 1218 states and 1381 transitions. Second operand has 43 states, 43 states have (on average 3.6511627906976742) internal successors, (157), 43 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:21:30,930 INFO L93 Difference]: Finished difference Result 1904 states and 2120 transitions. [2022-01-09 22:21:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-09 22:21:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.6511627906976742) internal successors, (157), 43 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-01-09 22:21:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:21:30,934 INFO L225 Difference]: With dead ends: 1904 [2022-01-09 22:21:30,934 INFO L226 Difference]: Without dead ends: 1465 [2022-01-09 22:21:30,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=626, Invalid=4776, Unknown=0, NotChecked=0, Total=5402 [2022-01-09 22:21:30,935 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 449 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 22:21:30,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 1115 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 912 Invalid, 0 Unknown, 367 Unchecked, 0.4s Time] [2022-01-09 22:21:30,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2022-01-09 22:21:31,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 860. [2022-01-09 22:21:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 1.1385331781140862) internal successors, (978), 859 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:31,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 978 transitions. [2022-01-09 22:21:31,161 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 978 transitions. Word has length 76 [2022-01-09 22:21:31,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:21:31,161 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 978 transitions. [2022-01-09 22:21:31,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.6511627906976742) internal successors, (157), 43 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:31,162 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 978 transitions. [2022-01-09 22:21:31,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-09 22:21:31,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:21:31,163 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:21:31,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-09 22:21:31,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:31,376 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:21:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:21:31,376 INFO L85 PathProgramCache]: Analyzing trace with hash -100514461, now seen corresponding path program 8 times [2022-01-09 22:21:31,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:21:31,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749893617] [2022-01-09 22:21:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:21:31,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:21:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:21:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-09 22:21:31,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:21:31,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749893617] [2022-01-09 22:21:31,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749893617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:21:31,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660727663] [2022-01-09 22:21:31,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:21:31,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:31,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:21:31,760 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:21:31,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-09 22:21:31,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:21:31,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:21:31,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-09 22:21:31,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:21:32,668 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 22:21:32,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 17 [2022-01-09 22:21:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 35 proven. 77 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-09 22:21:32,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:21:33,146 INFO L353 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-01-09 22:21:33,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 37 [2022-01-09 22:21:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-09 22:21:33,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660727663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:21:33,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:21:33,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 18] total 52 [2022-01-09 22:21:33,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790567742] [2022-01-09 22:21:33,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:21:33,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-09 22:21:33,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:21:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-09 22:21:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2329, Unknown=0, NotChecked=0, Total=2652 [2022-01-09 22:21:33,250 INFO L87 Difference]: Start difference. First operand 860 states and 978 transitions. Second operand has 52 states, 52 states have (on average 3.019230769230769) internal successors, (157), 52 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:21:35,025 INFO L93 Difference]: Finished difference Result 1056 states and 1178 transitions. [2022-01-09 22:21:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-09 22:21:35,026 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.019230769230769) internal successors, (157), 52 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-09 22:21:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:21:35,028 INFO L225 Difference]: With dead ends: 1056 [2022-01-09 22:21:35,028 INFO L226 Difference]: Without dead ends: 811 [2022-01-09 22:21:35,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 122 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=934, Invalid=5228, Unknown=0, NotChecked=0, Total=6162 [2022-01-09 22:21:35,029 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 425 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 22:21:35,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 791 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1240 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2022-01-09 22:21:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-01-09 22:21:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 778. [2022-01-09 22:21:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.1415701415701416) internal successors, (887), 777 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 887 transitions. [2022-01-09 22:21:35,227 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 887 transitions. Word has length 77 [2022-01-09 22:21:35,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:21:35,227 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 887 transitions. [2022-01-09 22:21:35,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.019230769230769) internal successors, (157), 52 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:35,227 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 887 transitions. [2022-01-09 22:21:35,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-09 22:21:35,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:21:35,228 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:21:35,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-09 22:21:35,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-09 22:21:35,443 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:21:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:21:35,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1514679456, now seen corresponding path program 9 times [2022-01-09 22:21:35,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:21:35,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456854072] [2022-01-09 22:21:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:21:35,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:21:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:21:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-01-09 22:21:35,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:21:35,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456854072] [2022-01-09 22:21:35,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456854072] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:21:35,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477157353] [2022-01-09 22:21:35,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:21:35,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:21:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:21:35,571 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:21:35,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-09 22:21:35,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-09 22:21:35,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:21:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-09 22:21:35,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:21:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-01-09 22:21:36,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:21:36,617 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-01-09 22:21:36,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-01-09 22:21:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-09 22:21:36,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477157353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:21:36,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:21:36,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 32 [2022-01-09 22:21:36,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008695767] [2022-01-09 22:21:36,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:21:36,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-09 22:21:36,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:21:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-09 22:21:36,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-01-09 22:21:36,816 INFO L87 Difference]: Start difference. First operand 778 states and 887 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:40,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:21:40,168 INFO L93 Difference]: Finished difference Result 5363 states and 6159 transitions. [2022-01-09 22:21:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-09 22:21:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-09 22:21:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:21:40,179 INFO L225 Difference]: With dead ends: 5363 [2022-01-09 22:21:40,179 INFO L226 Difference]: Without dead ends: 5079 [2022-01-09 22:21:40,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=866, Invalid=5140, Unknown=0, NotChecked=0, Total=6006 [2022-01-09 22:21:40,180 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 1468 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-09 22:21:40,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1468 Valid, 1900 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 1465 Invalid, 0 Unknown, 22 Unchecked, 0.9s Time] [2022-01-09 22:21:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5079 states. [2022-01-09 22:21:40,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5079 to 939. [2022-01-09 22:21:40,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 1.140724946695096) internal successors, (1070), 938 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1070 transitions. [2022-01-09 22:21:40,457 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1070 transitions. Word has length 78 [2022-01-09 22:21:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:21:40,458 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 1070 transitions. [2022-01-09 22:21:40,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:21:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1070 transitions. [2022-01-09 22:21:40,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-09 22:21:40,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:21:40,459 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:21:40,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0